body, h1, h2, h3, h4, h5, h6, hr, p, blockquote,
dl, dt, dd, ul, ol, li,
pre,
fieldset, lengend, button, input, textarea,
th, td {
    margin: 0;
    padding: 0;
}

body,
button, input, select, textarea { /* for ie */
    font: 12px/1 "Microsoft YaHei",-apple-system,system-ui,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB",sans-serif;
}
h1 { font-size: 18px; /* 18px / 12px = 1.5 */ }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
h4, h5, h6 { font-size: 100%; }

address, cite, dfn, em, var { font-style: normal; }
code, kbd, samp, tt { font-family: "Courier New", Courier, monospace; }
small { font-size: 12px; }

ul, ol ,li { list-style: none; }

a { text-decoration: none; cursor: pointer; }

abbr[title], acronym[title] { 
    border-bottom: 1px dotted;
    cursor: help;
}

q:before, q:after { content: ''; }

legend { color: #000; } /* for ie6 */
fieldset,img ,input ,button{ border: none; } 

button, input, select, textarea {
    font-size: 100%;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

hr {
    border: none;
    height: 1px;
}

// 把w3c盒模型更改为IE盒模型
*,:after,:before{
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    -o-box-sizing: border-box; 
    -ms-box-sizing: border-box; 
    box-sizing: border-box; 
}